Inkok Industrial Co.,LTD

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Gun Drill Type

Process

A method of forcibly discharging a high-pressure cutting oil inside a drill through a FLUTE that touches a chip generated from a cutting blade
The chip is continuously discharged and the processed hole serves as a guide continuously, so there is little and the illumination and precision of the processing surface are high.

- Available at the machining center, NC lathes & turret lather
- Available without a guide bush
- Inability to use sticky materials such as low carbon steel for structural rolled steel
- Each Part name of GUN DRILL

Work materials	Hardness / HB	Cutting speed(m/mim)	Feed f (mm/rev)
Free-cutting			DATA1
crabon steels
S10C ~ S15C	160 ~ 190	130
S30C ~ S50C	200 ~ 230	100
S35C ~ S50C	250 ~ 300	80
Carboon steel
S10C ~ S35C	110 ~ 120	130
S10C ~ S50C	120 ~ 185	120
S50C	170 ~ 200	100
S20C ~ S30C	210 ~ 250	90	DATA2
S30C~ S55C	260 ~ 310	70
S50C ~	320 ~ 375	50
S55C ~	380 ~ 440	40
Alloy steel
Scr. SNC SNCM. SCM etc	150 ~ 230
Cast steel
SC	140 ~ 180	100
	190 ~ 240	90
Tool steel			DATA3
SKS, SKD etc	150 ~ 200	70
	210 ~ 300	50
Stainless steel
(Ferrite) SUS405, 430	150 ~ 200	70
(Austneite) SUS 304, 305	160 ~ 220	50
(Murtensite) SUS 403, 410	160 ~ 220	70
(Murtensite) SUS 403, 410	300 ~ 350	50
High speed steel	210 ~ 285	50
braring steel	150 ~ 210	70
Difficult to cut material		20
Gray cast irons			DATA4
FC 100~350	110 ~ 180	90
	190 ~ 220	80
	220 ~ 260	70
Cast alumimum alloys
AC3A, etc,
	5000 load	180
Aluminum die cast	40 ~ 100
alloys
Copper alloys	120 ~ 160	<150
	160 ~ 205	<150	DATA5
Ductill cast irons
FCD 400 ~ 700	120 ~ 170	80
	180 ~ 240	65
	240 ~ 280	55
	260 ~ 320	40
Malledable cast irols
FCMB	110 ~ 180	90
	190 ~ 220	80
	220 ~ 260	70